CN109799221B - Detachable Raman spectrometer system for teaching and control method thereof - Google Patents
Detachable Raman spectrometer system for teaching and control method thereof Download PDFInfo
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- CN109799221B CN109799221B CN201910011791.0A CN201910011791A CN109799221B CN 109799221 B CN109799221 B CN 109799221B CN 201910011791 A CN201910011791 A CN 201910011791A CN 109799221 B CN109799221 B CN 109799221B
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Abstract
The invention discloses a detachable teaching Raman spectrometer system and a control method thereof, wherein the system comprises: the device comprises a narrow-linewidth laser light source, a confocal microscopic signal collecting system and a computer, wherein the narrow-linewidth laser light source is used for generating laser and outputting the laser to the confocal microscopic signal collecting system, the confocal microscopic signal collecting system is used for receiving the laser and irradiating the laser to a sample to excite the laser to generate signal light, the signal light is processed and then sent to the computer, and the computer is used for reading and visually processing the signal light. The control method of the Raman spectrometer system for teaching provided by the invention utilizes the basic optical component to assemble the Raman spectrometer, is detachable, reusable, advanced in process, stable and reliable, low in cost and high in cost performance, and is suitable for teaching experiments of middle school and university and scientific research activities with lower requirements.
Description
Technical Field
The invention relates to the field of material structure analysis instruments, in particular to a detachable teaching Raman spectrometer system and a control method thereof.
Background
Compared with the conventional chemical analysis technology, the Raman spectrum technology has the characteristics of no damage, rapidness, environmental protection, small water interference, capability of detecting isomers, no need of sample preparation, small required sample amount and the like, so that the Raman spectrum technology is vigorously developed in the fields of petrochemical industry, biomedicine, geological archaeology, criminal law, gem identification, environmental monitoring and the like. With the development of laser technology, photosensitive materials and imaging technology, the raman spectrum detection technology will be one of the most reliable and widely applied analysis and detection technologies.
For the important analysis and detection technology of Raman spectrum, China highly depends on import in the fields of scientific research, industrial production and commercial application, the level of autonomous localization is very low, only a few manufacturers still depend on import for core technology, and the performance has little difference with the brand ratio of developed countries such as Europe, America, Japan and the like. The Raman spectrometers on the market are all complex, are not suitable for being disassembled and assembled for use, and are not suitable for teaching. Therefore, the market has urgent need for a domestic Raman spectrometer which can be used for teaching, can be circularly disassembled and assembled for use, and has low cost and high cost performance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a detachable teaching Raman spectrometer system and a control method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a detachable raman spectrometer system for teaching, comprising: a narrow linewidth laser light source, a confocal microscopic signal collecting system and a computer,
the narrow-linewidth laser light source is used for generating laser and outputting the laser to the confocal microscopic signal collecting system, the confocal microscopic signal collecting system is used for receiving the laser, irradiating the laser on a sample to excite the laser to generate signal light, processing the signal light and then sending the processed signal light to the computer, and the computer is used for reading and visually processing the signal light.
Further, a detachable raman spectrometer system for teaching as described above, the narrow linewidth laser light source comprising: the laser generator is connected with the linear multistage adjustable excitation power supply.
Further, a detachable raman spectrometer system for teaching as described above, said confocal microscopic signal collection system comprising: the device comprises a sample load area, an objective lens, a dichroic mirror and a reflecting mirror which are arranged from front to back in a detachable horizontal direction, the reflecting mirror, a light filter, a convex lens, a slit, a first concave mirror, a grating, a second concave mirror and a CCD camera which are arranged from left to right in the horizontal direction, wherein the laser generator is arranged on the horizontal right side of the dichroic mirror, a light outlet of the laser generator is aligned with the dichroic mirror, and a lens of the CCD camera is aligned with the second concave mirror,
laser light output by the laser generator is reflected to the objective lens through the dichroic mirror, is focused to a sample in the sample load area through the objective lens, the sample is excited by the laser light to generate signal light, the signal light returns to the dichroic mirror through the objective lens, penetrates through the dichroic mirror and points to the reflecting mirror, is converted into parallel light after being reflected through the optical filter, the convex lens, the slit and the first concave mirror, is converted into the parallel light, the signal light is split on the grating, the signal light with different colors after being split is converged to different points on the CCD camera through the second concave mirror, and is sent to the computer through the CCD camera.
Further, as described above, in the detachable raman spectrometer system for teaching, the optical filter is an Edge optical filter.
Further, according to the above detachable raman spectrometer system for teaching, the light outlet of the laser generator is aligned to the center of the dichroic mirror, and an included angle between a laser path emitted by the laser generator and a mirror surface of the dichroic mirror is 45 degrees.
Further, according to the above detachable raman spectrometer system for teaching, an included angle between a laser light path passing through the dichroic mirror and a mirror surface of the reflecting mirror is 45 degrees, and the reflecting mirror is a plane mirror.
Further, according to the above detachable raman spectrometer system for teaching, the focal point of the convex lens is located at the center of the slit, and the laser path reflected by the reflecting mirror passes through the center of the slit after being focused by the convex lens.
A control method of a detachable teaching Raman spectrometer system comprises the following steps:
s1, assembling each optical element with the corresponding supporting sleeve and the element frame;
s2, fixing the narrow-linewidth laser light source set at a position which is slightly left in the middle of the bread board, enabling the laser direction to be horizontal to the left, adjusting the supporting rod, determining the height of the light path plane and the height of the light path plane to be the same as that of the slit, turning on the linear multistage adjustable excitation power supply, rotating the safety key, and adjusting the current to enable the emitted laser to be parallel to the desktop;
s3, fixing the dichroic mirror set on the left side of the narrow-linewidth laser light source, roughly adjusting by changing the fixed position and angle, and accurately adjusting by rotating an adjusting knob on a mirror frame, so that laser light is in the center of the dichroic mirror and forms an included angle of a first preset angle with the mirror surface of the dichroic mirror, and reflected light is still parallel to the desktop;
s4, fixing the objective lens set at the first preset distance along the direction of the reflected light, making the laser completely enter the objective lens to form a straight convergent light, determining the focus position by a white board, and fixing the sample cell frame at the position;
s5, fixing a plane mirror set at a second preset distance along the transmission light direction passing through the dichroic mirror, adjusting to enable laser to be irradiated in the center of the plane mirror, forming an included angle of a second preset angle with the mirror surface of the plane mirror, enabling reflected light to be parallel to the table surface and emit to the right side, fixing a convex lens set at a third preset distance along the reflected light direction, enabling the laser to pass through the center of the convex lens, and enabling the focal point position to be located at the center of the slit;
s6, fixing a first concave mirror set along the slit position forward to the focal length of the first concave mirror along the laser direction, adjusting to enable the laser to irradiate the center of the first concave mirror and form an included angle with the normal of the first concave mirror, and enabling the reflected light to be parallel to the desktop and approximate to parallel light;
s7, installing a grating set at a certain position along the direction of reflected light, adjusting to enable laser to irradiate the center of the grating, enabling the reflected light to be parallel to the desktop and emit to the right side, repeatedly adjusting the included angle between the grating and the laser, determining the light splitting direction by using a white paper board until first-order diffraction is obtained, adjusting to enable the first-order diffraction to be parallel to the desktop, and fixing a second concave mirror set in the direction; if the light splitting direction of the grating enables the long-wavelength light to be positioned at the inner side, the laser lights the outer side edge of the second concave mirror, and if the light splitting direction of the grating enables the long-wavelength light to be positioned at the outer side, the laser lights the inner side edge of the second concave mirror; deflecting the second concave mirror to enable the reflected light to be emitted to the left side, and adjusting the distance between the second concave mirror and the grating to enable the second concave mirror to just bear the complete spectrum;
s8, determining the focus position of the reflected light by a white board, fixing the CCD camera at the focus position, and adjusting to focus the reflected light on the surface of the photosensitive element of the CCD camera; if the light splitting direction of the grating enables the long-wavelength light to be located on the inner side, the laser is focused on the outer edge of the window of the CCD camera, and if the light splitting direction of the grating enables the long-wavelength light to be located on the outer side, the laser is focused on the edge of the inner side of the window of the CCD camera;
s9, fixing the optical filter sleeve between the grating and the convex lens, enabling laser to vertically penetrate through the center of the optical filter, fixing the sample cell frame, and covering the spectrometer cover;
and S10, starting the computer, receiving the signal light output by the CCD camera, and performing visualization processing on the signal light.
Further, according to the control method of the detachable raman spectrometer system for teaching, the optical filter is an Edge optical filter.
Further, according to the control method of the detachable raman spectrometer system for teaching, the first preset angle is 45 degrees, and the second preset angle is 45 degrees.
The invention has the beneficial effects that: the Raman spectrometer system for teaching and the control method thereof provided by the invention have the advantages that the Raman spectrometer is assembled by using the basic optical components, and the Raman spectrometer is detachable, reusable, advanced in process, stable, reliable, low in cost and high in cost performance, and is suitable for teaching experiments of middle school and university and scientific research activities with lower requirements; the computer software is adopted for control, so that different post-processing and imaging of signals can be realized, and different requirements can be met; through a confocal microscopic signal collection system, substances in a certain area on the surface of a sample can be specifically analyzed, and the partition analysis of a complex sample is realized.
Drawings
Fig. 1 is a schematic structural diagram of a detachable raman spectrometer system for teaching provided in an embodiment of the present invention;
fig. 2 is a schematic flow chart of a control method of a detachable teaching raman spectrometer system according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1, a detachable raman spectrometer system for teaching includes: a narrow linewidth laser light source 1, a confocal microscopic signal collecting system and a computer 13,
the narrow-linewidth laser light source 1 is used for generating laser and outputting the laser to the confocal microscopic signal collecting system, the confocal microscopic signal collecting system is used for receiving the laser, irradiating the laser on the sample 4 to excite the laser to generate signal light, the signal light is processed and then sent to the computer 13, and the computer 13 is used for reading and visually processing the signal light.
The narrow-linewidth laser light source 1 includes: the laser generator is connected with the linear multistage adjustable excitation power supply.
The confocal microscopic signal collection system comprises: the device comprises a sample load area, an objective lens 3, a dichroic mirror 2 and a reflecting mirror 5 which are detachably arranged in the horizontal direction from front to back, the reflecting mirror 5, a light filter 6, a convex lens 7, a slit 8 and a first concave mirror 9 which are arranged in the horizontal direction from left to right, and further comprises a grating 10, a second concave mirror 11 and a CCD camera 12, wherein the laser generator is arranged on the horizontal right side of the dichroic mirror 2, a light outlet of the laser generator is aligned with the dichroic mirror 2, a lens of the CCD camera 12 is aligned with the second concave mirror 11,
laser output by a laser generator is reflected to an objective lens 3 through a dichroic mirror 2 and focused to a sample 4 in a sample load area through the objective lens 3, the sample 4 is excited by the laser to generate signal light, the signal light returns to the dichroic mirror 2 through the objective lens 3 and is directed to a reflecting mirror 5 through the dichroic mirror 2, the signal light after being reflected passes through an optical filter 6, a convex lens 7, a slit 8 and a first concave mirror 9 and then becomes parallel light, the signal light after becoming the parallel light is split on a grating 10, the signal light with different colors after being split is converged to different points on a CCD camera 12 through a second concave mirror 11, and the signal light is sent to a computer 13 through the CCD camera 12. The sample loading area is fixed on the focal length of the objective lens 3 through the adapter and is adjustable in front and back.
The filter 6 is an Edge filter.
The light outlet of the laser generator is aligned with the center of the dichroic mirror 2, and the included angle between the laser path emitted by the laser generator and the mirror surface of the dichroic mirror 2 is 45 degrees.
An included angle between a laser light path passing through the dichroic mirror 2 and the mirror surface of the reflecting mirror 5 is 45 degrees, and the reflecting mirror 5 is a plane mirror.
The focus of the convex lens 7 is positioned in the center of the slit 8, and the laser light path reflected by the reflector 5 passes through the center of the slit 8 after being focused by the convex lens 7.
The working principle is as follows:
laser output along the narrow-linewidth laser light source 1 is reflected by the dichroic mirror 2 and converged on a sample 4 along the objective lens 3, signal light generated by excitation of the sample 4 returns to the dichroic mirror 2 through the objective lens 3, the signal light penetrates through the dichroic mirror 2 and points to the reflecting mirror 5, stray light is removed through the optical filter 6 after reflection, the stray light is converged on the slit 8 through the convex lens 7, and then the stray light is reformed into parallel light through the first concave mirror 9. Light is split on the grating 10, light with different colors is converged on different points on the CCD camera 12 by the second concave mirror 11, and signals are read out by a computer 13 connected with the CCD camera and relevant software installed on the computer 13 and are visualized and processed subsequently.
As shown in fig. 2, a method for controlling a detachable raman spectrometer system for teaching, includes:
s1, assembling each optical element with the corresponding supporting sleeve and the element frame;
s2, fixing the narrow-linewidth laser light source set at a position which is slightly left in the middle of the bread board, enabling the laser direction to be horizontal to the left, adjusting the supporting rod, determining the height of the light path plane and the height of the light path plane to be the same as that of the slit, turning on the linear multistage adjustable excitation power supply, rotating the safety key, and adjusting the current to enable the emitted laser to be parallel to the desktop;
s3, fixing the dichroic mirror set on the left side of the narrow-linewidth laser light source, roughly adjusting by changing the fixed position and angle, and accurately adjusting by rotating an adjusting knob on a mirror frame, so that laser light is in the center of the dichroic mirror and forms an included angle of a first preset angle with the mirror surface of the dichroic mirror, and reflected light is still parallel to the desktop;
s4, fixing the objective lens set at the first preset distance along the direction of the reflected light, making the laser completely enter the objective lens to form a straight convergent light, determining the focus position by a white board, and fixing the sample cell frame at the position;
s5, fixing a plane mirror set at a second preset distance along the transmission light direction passing through the dichroic mirror, adjusting to enable laser to be irradiated in the center of the plane mirror, forming an included angle of a second preset angle with the mirror surface of the plane mirror, enabling reflected light to be parallel to the table surface and emit to the right side, fixing a convex lens set at a third preset distance along the reflected light direction, enabling the laser to pass through the center of the convex lens, and enabling the focal point position to be located at the center of the slit;
s6, fixing a first concave mirror set along the slit position forward to the focal length of the first concave mirror along the laser direction, adjusting to enable the laser to irradiate the center of the first concave mirror and form an included angle with the normal of the first concave mirror, and enabling the reflected light to be parallel to the desktop and approximate to parallel light;
s7, installing a grating set at a certain position along the direction of reflected light, adjusting to enable laser to irradiate the center of the grating, enabling the reflected light to be parallel to the desktop and emit to the right side, repeatedly adjusting the included angle between the grating and the laser, determining the light splitting direction by using a white paper board until first-order diffraction is obtained, adjusting to enable the first-order diffraction to be parallel to the desktop, and fixing a second concave mirror set in the direction; if the light splitting direction of the grating enables the long-wavelength light to be positioned at the inner side, the laser lights the outer side edge of the second concave mirror, and if the light splitting direction of the grating enables the long-wavelength light to be positioned at the outer side, the laser lights the inner side edge of the second concave mirror; deflecting the second concave mirror to enable the reflected light to be emitted to the left side, and adjusting the distance between the second concave mirror and the grating to enable the second concave mirror to just bear the complete spectrum;
s8, determining the focus position of the reflected light by a white board, fixing the CCD camera at the focus position, and adjusting to focus the reflected light on the surface of the photosensitive element of the CCD camera; if the light splitting direction of the grating enables the long-wavelength light to be located on the inner side, the laser is focused on the outer edge of the window of the CCD camera, and if the light splitting direction of the grating enables the long-wavelength light to be located on the outer side, the laser is focused on the edge of the inner side of the window of the CCD camera;
s9, fixing the optical filter sleeve between the grating and the convex lens, enabling laser to vertically penetrate through the center of the optical filter, fixing the sample cell frame, and covering the spectrometer cover;
and S10, starting the computer, receiving the signal light output by the CCD camera, and performing visualization processing on the signal light.
The optical filter is an Edge optical filter.
The first preset angle is 45 degrees, and the second preset angle is 45 degrees.
Example one
A control method of a detachable teaching Raman spectrometer system comprises the following steps:
s101, assembling each optical element with the corresponding supporting sleeve and the corresponding element frame.
S102, firstly, fixing the laser light source sleeve group at the position which is on the left side in the middle of the bread board, wherein the distance between the laser light source sleeve group and the left edge of the bread board is about 200mm, and the distance between the laser light source sleeve group and the lower edge of the bread board is about 350mm, and enabling the laser direction to be horizontal to the left. The support rod is adjusted to determine the height of the light path plane, which should be avoided to be too high or too low, about 100mm, to ensure the same height as the slit. And a laser power supply is turned on, the safety key is rotated, the current is adjusted to be proper, and the emitted laser is ensured to be parallel to the desktop.
And S103, fixing the dichroic mirror set at the position of about 50mm on the left side of the laser light source, roughly adjusting by changing the fixed position and angle, and accurately adjusting by rotating an adjusting knob on a mirror bracket, so that laser light is irradiated in the center of the dichroic mirror and forms an included angle of 45 degrees with the mirror surface, and reflected light is still parallel to the desktop.
S104, fixing the objective lens set at a position of about 50mm along the direction of reflected light, enabling laser to completely enter the objective lens to form straight convergent light, determining the position of a focus by using a white paper board, and fixing the sample cell frame at the position. For the convenience of subsequent assembly, the sample cell frame can be temporarily not fixed, and an additional reflector is fixed on one surface to return the light original path, and the light is reduced into parallel light by the objective lens and then passes through the dichroic mirror.
And S105, fixing a plane mirror set at a position of about 75mm along the direction of transmission light passing through the dichroic mirror, enabling laser to be irradiated in the center of a plane mirror through adjustment, forming an included angle of 45 degrees with the plane mirror, and enabling reflected light to be parallel to the table top and emit to the right side. The convex lens set is fixed at a position of about 50mm along the direction of the reflected light, and the laser light passes through the center of the lens. And the focal position is located in the center of the slit.
S106, fixing a concave mirror set along the slit position by 150mm forward along the laser direction (namely the focal length of the concave mirror), adjusting to enable the laser to irradiate the center of the dichroic mirror and form a small included angle with the normal of the mirror surface, and enabling the reflected light to be parallel to the desktop and approximate to parallel light.
S107, installing a grating sleeve group at a proper position along the direction of reflected light, adjusting to enable laser to be irradiated in the center of the grating, enabling the reflected light to be parallel to the desktop and emit to the right side, repeatedly adjusting an included angle between the grating and the laser, and determining the light splitting direction by using a white paper board until stronger first-order diffraction is obtained. The adjustment makes the first order diffraction light parallel to the desktop, and fixes the concave mirror set in this direction, if the light splitting direction of the grating makes the long wavelength light locate at the inner side, the laser should be made to irradiate the outer side edge of the concave mirror, and vice versa. The concave mirror is slightly deflected so that the reflected light is emitted to the left. The distance between the concave mirror and the grating is adjusted to ensure that the concave mirror just bears the complete spectrum.
S108, determining the focus position of the reflected light by using a white board, fixing the CCD at the focus position, adjusting to focus the reflected light on the surface of the CCD photosensitive element, and if the light splitting direction of the grating enables the long-wavelength light to be positioned at the inner side, focusing the laser on the outer edge of the CCD window, and vice versa.
And S109, finally, fixing the Edge optical filter sleeve between the grating and the convex lens, enabling the laser to vertically penetrate through the center of the optical filter, fixing the sample cell frame, and covering the spectrometer cover.
And S110, starting a computer, running self-made post-processing software which is compiled based on C language and can work and collect CCD signals on a Windows operating system, reading signal light received from a CCD camera, performing visual processing, and presenting.
Compared with the prior art, the invention has the following outstanding advantages:
(1) the method innovatively utilizes the basic optical components to assemble the Raman spectrometer, is detachable, reusable, advanced in process, stable, reliable, low in cost and high in cost performance, and is suitable for teaching experiments of middle schools and universities and scientific research activities with low requirements;
(2) the system integrates a data visualization and post-processing module, adopts computer software control, can realize different post-processing and imaging of signals, and meets different requirements;
(3) the system comprises a confocal microscopic signal collecting system, can specifically analyze substances in a certain area on the surface of a sample, and realizes the partition analysis of a complex sample.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.
Claims (3)
1. A control method of a detachable teaching Raman spectrometer system comprises a narrow linewidth laser light source, a confocal microscopic signal collection system and a computer,
the narrow linewidth laser light source is used for generating laser and outputting to the confocal microscopic signal collection system, the confocal microscopic signal collection system is used for receiving the laser, and will the laser shines on the sample and arouses and produce signal light, to the signal light sends after handling to the computer, the computer is used for to signal light reads and visual processing, the narrow linewidth laser light source includes: the laser generator and the adjustable excitation power supply of the linear multistage who corresponds of encapsulation completion, laser generator with the adjustable excitation power supply of linear multistage is connected, confocal microscopic signal collection system includes: dismantled and assembled horizontal direction is from the past to the sample load district, objective, dichroic mirror and the speculum that sets up back, and horizontal direction sets up from a left side to the right the speculum, light filter, convex lens, slit and first concave mirror still include grating, second concave mirror and CCD camera, laser generator sets up the horizontal right side of dichroic mirror, laser generator's light outlet aligns the dichroic mirror, the camera lens of CCD camera aligns the second concave mirror, the laser that laser generator output passes through the dichroic mirror reflects on the objective, through the objective focus on the sample in sample load district, the sample is aroused by the laser and is produced signal light, signal light passes through the objective get back to the dichroic mirror, sees through the dichroic mirror is directional to the speculum, passes through the light filter after the reflection, convex lens, The slit and the first concave mirror become parallel light, the signal light which becomes the parallel light is split on the grating, the split signal light with different colors is converged to different points on the CCD camera through the second concave mirror and is sent to the computer through the CCD camera,
the control method is characterized by comprising the following steps:
s1, assembling each optical element with the corresponding supporting sleeve and the element frame;
s2, fixing the narrow-linewidth laser light source set at a position which is slightly left in the middle of the bread board, enabling the laser direction to be horizontal to the left, adjusting the supporting rod, determining the height of the light path plane and the height of the light path plane to be the same as that of the slit, turning on the linear multistage adjustable excitation power supply, rotating the safety key, and adjusting the current to enable the emitted laser to be parallel to the desktop;
s3, fixing the dichroic mirror set on the left side of the narrow-linewidth laser light source, roughly adjusting by changing the fixed position and angle, and accurately adjusting by rotating an adjusting knob on a mirror frame, so that laser light is in the center of the dichroic mirror and forms an included angle of a first preset angle with the mirror surface of the dichroic mirror, and reflected light is still parallel to the desktop;
s4, fixing the objective lens set at the first preset distance along the direction of the reflected light, making the laser completely enter the objective lens to form a straight convergent light, determining the focus position by a white board, and fixing the sample cell frame at the position;
s5, fixing a plane mirror set at a second preset distance along the transmission light direction passing through the dichroic mirror, adjusting to enable laser to be irradiated in the center of the plane mirror, forming an included angle of a second preset angle with the mirror surface of the plane mirror, enabling reflected light to be parallel to the table surface and emit to the right side, fixing a convex lens set at a third preset distance along the reflected light direction, enabling the laser to pass through the center of the convex lens, and enabling the focal point position to be located at the center of the slit;
s6, fixing a first concave mirror set along the slit position forward to the focal length of the first concave mirror along the laser direction, adjusting to enable the laser to irradiate the center of the first concave mirror and form an included angle with the normal of the first concave mirror, and enabling the reflected light to be parallel to the desktop and approximate to parallel light;
s7, installing a grating set at a certain position along the direction of reflected light, adjusting to enable laser to irradiate the center of the grating, enabling the reflected light to be parallel to the desktop and emit to the right side, repeatedly adjusting the included angle between the grating and the laser, determining the light splitting direction by using a white paper board until first-order diffraction is obtained, adjusting to enable the first-order diffraction to be parallel to the desktop, and fixing a second concave mirror set in the direction; if the light splitting direction of the grating enables the long-wavelength light to be positioned at the inner side, the laser lights the outer side edge of the second concave mirror, and if the light splitting direction of the grating enables the long-wavelength light to be positioned at the outer side, the laser lights the inner side edge of the second concave mirror; deflecting the second concave mirror to enable the reflected light to be emitted to the left side, and adjusting the distance between the second concave mirror and the grating to enable the second concave mirror to just bear the complete spectrum;
s8, determining the focus position of the reflected light by a white board, fixing the CCD camera at the focus position, and adjusting to focus the reflected light on the surface of the photosensitive element of the CCD camera; if the light splitting direction of the grating enables the long-wavelength light to be located on the inner side, the laser is focused on the outer edge of the window of the CCD camera, and if the light splitting direction of the grating enables the long-wavelength light to be located on the outer side, the laser is focused on the edge of the inner side of the window of the CCD camera;
s9, fixing the optical filter sleeve between the grating and the convex lens, enabling laser to vertically penetrate through the center of the optical filter, fixing the sample cell frame, and covering the spectrometer cover;
and S10, starting the computer, receiving the signal light output by the CCD camera, and performing visualization processing on the signal light.
2. The method of claim 1, wherein the optical filter is an Edge filter.
3. The method of claim 1, wherein the first predetermined angle is 45 degrees and the second predetermined angle is 45 degrees.
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| CN206656801U (en) * | 2017-03-09 | 2017-11-21 | 上海星必光电科技有限公司 | Compact ccd array spectrometer and Raman spectrum detection system |
| CN106872442A (en) * | 2017-03-20 | 2017-06-20 | 江苏师范大学 | A kind of MEMS Miniature Raman spectrometers |
| CN108700523A (en) * | 2017-12-22 | 2018-10-23 | 深圳达闼科技控股有限公司 | A kind of Raman system |
| CN108181294B (en) * | 2018-01-05 | 2023-11-07 | 厦门大学 | Raman spectrometer optical path system |
| CN108680557B (en) * | 2018-07-02 | 2021-02-19 | 山东大学 | Method for testing phonon anisotropy of SiC crystal based on polarized Raman spectrum |
| CN108994447A (en) * | 2018-09-12 | 2018-12-14 | 北京青木子科技发展有限公司 | A kind of medical instrument on-line monitoring preparation system and method based on femtosecond laser |
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2019
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